Instability phenomena in the gas-metal arc welding self-regulation process


Bingul Z.

PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART B-JOURNAL OF ENGINEERING MANUFACTURE, cilt.216, ss.899-910, 2002 (SCI İndekslerine Giren Dergi) identifier identifier

  • Cilt numarası: 216
  • Basım Tarihi: 2002
  • Doi Numarası: 10.1243/095440502320192897
  • Dergi Adı: PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART B-JOURNAL OF ENGINEERING MANUFACTURE
  • Sayfa Sayıları: ss.899-910

Özet

Arc instability is a very important determinant of weld quality. The instability behaviour of the gas-metal arc welding (GMAW) process is characterized by strong oscillations in arc length and current. This phenomenon was reported by Halmoy [1] for the short electrode extension and by Lebedev [2] for the long electrode extension, particularly as related to the arc voltage-current characteristics and the thermal inertia of the electrode wire respectively. However, with these studies, a complete theoretical explanation of the instability phenomena is lacking since the process is not modelled dynamically.